Apparatus and method for wireless energy and/or data transmission between a source device and at least one target device

• US 7,999,414 B2
• Filed: 08/29/2008
• Issued: 08/16/2011
• Est. Priority Date: 09/01/2007
• Status: Expired due to Fees

• Current Assignee: Maquet GmbH & Company KG (Universal Robot Systems GmbH & Co KG)
• Original Assignee: Maquet GmbH & Company KG (Universal Robot Systems GmbH & Co KG)
• Inventors: Brühn, Alfred
• Primary Examiner(s): FIN, MICHAEL RUTLAND
• Application Number:
  US12/200,949
• Publication Number:
  US 20090085408A1
• Time in Patent Office: 1,082 Days
• Field of Search: 307/104, 320/108
• US Class Current: 307/104
• CPC Class Codes: H01F 2038/143 for signals
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

The invention relates to an apparatus and a method for wireless energy and/or data transmission between a source device and at least one target device, in which apparatus and method a voltage is induced by at least one primary coil (18), on the source-device side, of at least one primary circuit in at least one secondary coil (20), on the target-device side, of at least one secondary circuit and in at least one coil of at least one resonant circuit, the resonant circuit being arranged so as to be electrically isolated from the primary circuit and from the secondary circuit.

Claims

1. An apparatus for wireless energy and/or data transmission between a source device and at least one target device, the apparatus comprising:

at least one primary coil, on the source-device side, of at least one primary circuit;

at least one secondary coil, on the target-device side, of at least one secondary circuit;

a first resonator having a first resonant circuit with a first resonant circuit coil and a first capacitor, the first resonant circuit being electrically isolated from the primary circuit and from the secondary circuit; and

at least a second resonator having a second resonant circuit with a second resonant circuit coil and a second capacitor, the second resonant circuit being electrically isolated from the primary circuit and from the secondary circuit and from the first resonant circuit, at least one of the first and second resonators has a resonant frequency which is different from the frequency of an energy source arranged in the primary circuit, the resonant frequency being twice or 0.5 times the frequency of the energy source;

wherein the primary coil, the secondary coil, the first resonant circuit coil, and the second resonant circuit coil are arranged in the same magnetic circuit.

4. The apparatus according to claim 1, wherein the primary coil, the secondary coil, the first resonant circuit coil, and the second resonant circuit coil forming the inductance of the resonant circuit being arranged around a magnet core forming the magnetic circuit.

5. The apparatus according to claim 1, wherein at least one of the first and second resonant circuit coils include windings that are formed as a bifilar winding.

6. The apparatus according to claim 1, wherein the first and second resonators have different resonant frequencies from one another.

7. The apparatus according to claim 1, wherein the winding of the secondary coil and at least one of the first and second resonant circuit coils include windings being formed as a bifilar winding.

2. A method for wireless energy and data transmission between a source device and at least one target device,

in which a voltage is induced and a first resonator and at least a second resonator are excited by at least one primary coil, on the source-device side, of at least one primary circuit and at least one secondary coil, on the target-device side, of at least one secondary circuit;

the first resonator being formed by a first resonant circuit with at least one first resonant circuit coil and with at least a first capacitor, the first resonant circuit being electrically isolated from the primary circuit and from the secondary circuit;

the second resonator being formed by a second resonant circuit with at least a second resonant circuit coil and with at least a second capacitor, the second resonant circuit being electrically isolated from the primary circuit and from the secondary circuit, at least one of the first and second resonators has a resonant frequency which is different from the frequency of an energy source arranged in the primary circuit, the resonant frequency being twice or 0.5 times the frequency of the energy source; and

wherein the primary coil, the secondary coil, the first resonant circuit coil, and the second resonant circuit coil are arranged in the same magnetic circuit.

3. The method according to claim 2, wherein energy is supplied to the resonant circuits by the induced voltage, and the energy excites the respective resonant circuits, and

in that the excited resonant circuits generate a magnetic field which alternates with the resonant frequency of the respective resonant circuit and by means of which a voltage is induced in the secondary coil.